<?php
$str='"\'1576{"operation_history":{"is_operation":"","operation_des":"","operation_date":""},"infectious_diseases":{"is_infectious":"","infectious_des":""},"family_cancer_history":{"is_cancer":"","relation":"","tumor_types":""}}{"is_chemotherapy":"","is_target":"","chemotherapy_treatment":"","chemotherapy_cycle":"","last_chemotherapy_date":"","target_treatment":"","target_begin_date":"","target_end_date":"","is_immunity":"","immunity_treatment":""}1图文信息投影仪1,3214"';
$new=str_replace('"','',$str);
$new=str_replace("'","",$new);
var_dump($new);